PTHH: FexOy + yCO =(nhiệt)=> xFe + yCO2
Ta có: nFexOy = \(\frac{2,32}{56x+16y}\left(mol\right)\)
nCO2 = \(\frac{0,896}{22,4}=0,04\left(mol\right)\)
\(\Rightarrow n_{FexOy}=\frac{0,04}{y}\left(mol\right)\)
\(\Rightarrow\frac{2,32}{56x+16y}=\frac{0,04}{y}\)
Giải ra, ta được \(\frac{x}{y}=\frac{3}{4}\)
=> CTHH : Fe3O4